Asking a network interface for its stats leaked leftover kernel stack
Brief
This is not the tty session crash already on the site.
Notes
msg162851 (bluhm@, 2026-08-20). OPENBSD_7_8 sys/net/if.c. “SIOCGIFDATA (on most architectures) leaked 4 bytes of kernel stack.” from deraadt@; from Acts1631. Named errata/7.8/046_ifioctl.patch.sig.
msg162853 is the same text on OPENBSD_7_9, named errata/7.9/010_ifioctl.patch.sig.
The first if.c commits reused the TIOCGSID tty log and were backed out. msg162850 and msg162852 say “commit message was wrong.” That was not this hole. Do not fold this into 69d3aef8.
No OpenBSD src SHA on GitHub or Codeberg. Do not invent one.
Official errata79 010 and errata78 046 are SECURITY FIX, dated August 22, 2026. Pages Last-Modified Sun 23 Aug 2026 07:08:33 GMT.
Commit msg162851